Type-writing machine.



' C. T. FRANTZ.

TYPE WRITING MA'IEHINE.

APPLIGATIONTILED MAY 19, 1909.

Patented Nov. 24, 1914,

4 BHBBTSSHEET 1.

c. T. FRANTZ. TYPE WRITING MACHINE.

AIfPLIOATION FILED MAY 19, 1909.

1,1. 18,339; Patented Nov. 24, 1914.

4 SHEETS-$113171 2.

C. T. FRANTZ. TYPE WRITING MACHINE.

APPLICATION nun MAY 10,1009.

1 118,389, Patented Nov. 24, 1914. 9 4 SHEETE'SHEET (L 0'. I. FRANTZ.

TYPE WRITING MACHINE. APPLICATION FILED MAY 19, 1909.

Patented Nov. 24, 19M

1 SHEETSSIIEBT 4.

is a similar view UNliilili) tdlirtlllllfitd PATENT FFIC.

CHARLES T. FRANTZ, OF CHICAGO, ILLINOIS, ASSIGNOR T0 FRED I. GORIN, OF

CHICAGO. ILLINOIS.

Application filed May 19. 1909.

To all whom. it may concern lie it known that 1. CHARLES l. FRANTZ, a citizen of the United States, residing at Chicago, in the county of Cook and State o'l' lllinois, have invented certain new and useful Impi-(wements in Type Writing Machines, oi which the .lollowing is a full, clear, and exact description.

My invention relates particularly to a tabulating attachment to ty iewritingmachines, and one of its objects is the provis on of simple and ellicient'; nua'zhanisu'l of this character whereby the carriage may be released from its feeding mechanism, gradually stopped at the end of its turned to an exact predetermined point.

A further object of the invention is the provision of a locking-out device in combination with a buffer which will eilect a gradual stopping oi the carriage at the end of its run and th automatic re-connection of the same with the feeding mechanism only in a predetcrmined position.

Another object of the invention is the pro vision oi a tabulating attachment for type writing machines comprising a resilient but fer for relieving the impact of the carriage and automatic apparatus for positively stopping the carriage exactly in a predetermined position.

Other objects of the invention will appear hereinafter, the novel con'il'iinations of elements being set forth in the appended claims.

In the accompanying drawings, Figure 1 represents a transverse sectional elevation of an ordinary typewriter with my invention applied thereto; Fig. 2 is a fragmentary rear view of Fig. 1, showing the usual main motor spring oi the typewriter; Fig. 3 an enlarged sectional elevation of a portion of Fig. 1; Fig. l; is a similar view but showing the carriage disconnected from the spacing dogs; .Fig. l" a. detail view; Fig. 5 is a front elevational view of the improved locking-out mechanism broken away from the typewriting machine; Fig. 5 is a pcrspectivc view oi one of the upper plunger-s; Fig. (5 is a. fragmentary plan view showing the buffer spring and locking-out mechanism in the position assumed while the typewriter is being used for writing continuously; Fig. 7 showing the position 0" parts after a tabulator key has been actuated Specification of Letters Patent.

run and re- Patented Nov. 24:, 1914:. Serial No. 496,946.

and the buffer spring is in the act oi relieving the impact of the carriage; Fig. detail end view of the stop rod; Fig. 8 is a view showing the position of the parts while the carriage is rebounding beyond its stopping point; are enlarged views of my improved adjustable stop devices.

Like reference characters (lesignate simh lar parts throughout the various views.

Referring to the drawings, 11 designates the base oi the typewriting machine, 12 the table of the supporting frame, 13 the back bar of the carriage 14, to which the latter is pivoted and along which it slides in the usual way. Pivoted to the back bar 13 independently ol' the carriage but connected to move therewith is a frame 15 which carries the eseapement rack 16. Coiiperating with this rack are spacing dogs 17 which are connected to spacing keys 18. Under the action of the main spring 19, which is connected in any desired manne at 20 to the carriage ii, the latter is fed, step-hy-step under the control of the spacing mechanism. "hese parts a re constructed and operated in a main ner well understood in the art to control the movement of the carriage while operating the typewriter keys in the ordinary way.

will now describe the selective stop mechanism for use in tabulating or writing in columns. To the back of the table 12 at 21 is rigidly connected an angular bracket 22, to the outer end of which are pivoted at and l igs. S) to 12, inclusive,

ELSSU Eli 23 the motion-transmitting levers 24, four of i which are in this instance shown, although the number may be varied as desired. That is to say, one of suchlevers may be used alone, or two or more of them may he used, depending upon the operation desired. These levers are suitably spaced apart and guided by means of a slotted bracket 25 which is rigidly attached to the upper end of the angular bracket 22 to occupy a slightly inclined position. To the lower end of each lever 24 is pivoted at 2.) a push rod 30 which extends along under the machine through guide openings 31 to the front of the machine and to the outer ends of the rods are connected the keys If desired springs 35 may be used for holding the rods 30 and levers :Z-l in initial position, as

the frame 11. Each of these springs is con nected at one end to the front plate of the frame 11 and at the other end to the rod 30 at 36. If desired the springs may be omitted and the springs 7 5 and 52 depended on to 7" store the levers 2st and rods 30 to initial position hereinafter explained.

Fixed to the rear of the table 12 at 68 is an angular plate 37 which is provided with an opening 58 of special contour, as indicated in Fig. 5. If desired, a reinforcing plate 7 9 may be fastened across the top of the plate 37 as shown in Fig. The plate 37 is an important feature as it effects the stopping of the carriage at exaetlythe point predetermined. This plate is rigidly fixed to the frame of the typewriting machine as are also the horizontal guide plate 25 and the supporting bracket and therefore these parts never move while the plate 37 is acting as the locking-out plate.

Back of the plate 37 are two longitudinal rods 39 and 40, the ends of which are rigidly attached to the rear of the table 12 of the typewriter frame. These rods extend parallel to the escapement rack bar 16 and the back pivot bar 13 of the machine, and are for the purpose of guiding and supporting the buffer block 41. The upper rod 40 also ll'l'lQS the buffer spring -12 between one end of the bu for block -l-1 and the slidable ring 4:5, the latter being used in connection with a set-screw 4- to adjust the tension of the buffer spring i2. It is evident that the buffer spring i2 tends to move the bu fler block to the right as viewed in Fig. 7, but the extent of this movement is limited by the stopping ring which may be held in adjusted position by the set-screw 46. As explained hereinafter the buffer block must occupy a. certain definite position with respect to the locking-out plate 37 and such position is obtained by varying the position of the limit stop 45.

As indicated in Fig. 2, the action of the buffer spring is opposed to that of the motorspring 19 of the typewriter and its tension is adjusted to be sufficiently greater than that of. the motor spring, to return the carriage to its proper position after the buffer block is struck. The tension of the main spring is also adjustable in the well known manner. lVith the apparatus herein disclosed the main spring may be adjusted to suit the operator but the spring 42 need not be adjusted so long as its tension is sutliciently greater than that of the main spring to return the bu tl'er block to initial position.

In the upper portion of the buffer block 41 are four vertical slots which may be cut into the material of the block or formed by front and rear combs securely fastened to the buffer block so as to form part thereof. These slots extend from front to rear in the former case and are located at the front and at the rear in the latter case.

These slots receive the flat plates or plungers &7, 48, a9 and which perform several functions. Each of these plungers is mounted to slide in its respective slot independently'of the others and each is provided with a short laterally extending pin 51. Against each of these pins bears the upper end of a spring there being one spring for each sliding plate or plimger. The other ends of these springs are fastened to the under side of the buffer block t1 by means of the plate The spring tends to move the sliding plates to the rear but such movement is limited by the lugs 5ft striking against the front face of the bu lfer block near the lower edge of the opening 38 in the lock plate"37. The opening 38 is sufiiciently large and so shaped that the plate 37 will not interfere with the lateral movement of the plungers whether projected or not.

The front ends of the plungers in the buf for block are each provided with inclined surfaces or cams 59 for engaging and lifting the longitudinal bar or rod 60, which is connected to the escapement rack frame 15 and carries steps or striking members 61, (32 and (53, movable along the rod 60 and capable of being fastened in adjusted position in the openings 68 of which there are many in a straight line along the rod (50 as indicated in Figs. (3 and 7. These striking members are intended to be set at points corresponding to the predetermined positions where the carriage is to stop in the operation of tabulation. It should be noted that theremay be a plurality of such striking members so that the carriage may be stopped at a corresponding number of places where, for instance, several columns of figures are to be tabulated on a single page. If desired, the tabulator bar 60 may be notched laterally to receive U-shaped stops or striking members, as is well understood by those skilled in the art. Or such striking members may consist of rings capable of being fastened in adjusted position by set screws. I prefer, however, to employ such. stops as are shown in Figs. 9, 10 and ll, and for a special purpose one such as shown in Fig. 1.2. Mounted on a pin 69 is a circularly-shaped or inverted U-shaped band 70 of spring metal, one end of which is curled at 71 to form a stop or striker to engage a lower plunger when projected, and the other end 7 2 of which may be extended outwardly as shown to facilitatethe removal. by hand of the whole device from the perforated rod (30. By inserting 'the pin 69 in a transverse opening 68 and pressing the spring loop 70 over the rod 60 the stop 71 will be securely held in r predetermined position to engage a plunger and be released therefrom to efi'ect the stopping of the carriage at the proper point. It will be noticed that the curled stop 71 is fl shn 1,1 wean side with the corresponding edge in" the hand and that the pin fill is secured to the inverted U-shaperl hand 70 near thesanic edge.

When one of the plungers is operated. and a rain it) engages the rod (ill to li ft the l'raiue 15 together with tho rarlc har it the latter in diseoninaoltal from tho cseapl-incnt pawls 17 ,whereupon the main spring lll (ll ig. 2) Wlll advance the carriage ll lrla-ly to the left as; viewed in Fig. h, or 'lr iu. the front of the twaewriting machine. until one ol the stops, as that (lmsig'nated l' l impinges against the outer end of the plunger and through the same transmits motion to the hullrr loch against the action oi the hull'cr spring l-Q. Free 'rohound is permitted and the main spring; and huller spring: may he so adjusted that the carriage will he stopped on its re turn movement at the proper point and the .lO(!l lIl -Ul,ll Inrrhanisln operate at such point to cause the rcle'ngagcnicnt ol' the rack bar with the D:?(7n l)tl'1l(flltl pawls.

In my taoaaanling application, Serial No. 462,193, filed ihweinher l2, ll lltw, for an i|nnorolnent in typenvrit n; machines. l have disclosed andfelaiined hu'li'er nn-chanisin to 'the plunger-s o'l which are integrally ron- "tee-ted means for maintaining a projected plunger in engagement with a atop until the carriage returns to the point where it is to stop. in such case. the tahula'tingl' hey may be relmsotl a'tter impart of a stop against a plunger and the latter will return autranatieally to initial position, althouah the carriage may rehound larthcr than intended. l have devised inechanisn'i which will. permit release ol a tahulatinsr hey alter impact and. automatimilly restore the parts to normal position even when the earriage rebounds beyond its ultimate stopping point as prelleterininell hy the position or the stop on the rod (it). This nierhaniislu l will now dcscri l is.

By referring to i igs. 4- and-l it will he seen that l have provided additional plan gers or slides 72 one in each of the slots in the butter block 41, in this instance four in number. These plnngers or slides 72 he loosely in engagement with the plungers l7 and ahove the same so as to he in Front of the extensions 73 of the lower plungers. By means of this construction when the lower plungers are actuated by the lever 24; impingii'ig against the same the extensions 7: will also he thrust forwanl but the lower plungors may he rcturnl d indepemhaitly of the upper plung'era. Each of the upper plungers provided with a laterally projcotingv pin 74- for receiving one end of a spring 75, the other end of which securely fastened to the plate 77 which in turn is fastened to the top ol the louder block 41 to hold the planners in proper position.

As indicalrd in l igs. -Lland l, each of the upper plungers is provided with looking lugs 7 which initially lie behind the plate 37 or rcspiaztively haoh ol' the stops at 163. When an upper plunger is thrust forward and the an: 55) receives the blow of the slop Tl the corresponding locking lug will move in front ol' the plate ill to the left as \irwcd in Fig. althus Pl'LHUlltiIlg' the return of the upper plunger to initial position until the holler him-h returns to initial position. The looking laps of the other luiiperplungers remain hark ol' the plate 37 and cannot he thrustl'orward until the butter hloeh returns. The Front portion ol' the slide 72 is of peculiar shape for a special purpose: A forwardly and downwardly extending linger so forms with the lhunih 81. an opening or eye 8k: in suoh position that when thrust forward it will lie in the path of movement o." the latrral upper extensions 33 ol the stop devious. These extensions are of such hilluess that when projeoted into the opening: an it cannot he withdrawn through the pansap'o between the finger hil and the thunih i. Although l wish to depend on illl' stop "(I to alrihe against the plunger 4:7 to lranainit motion to the hull'cr hloek :raa 1|sl tluarlioll ol the hull'er spring, the upper (and oi the pin lit may also strike against the head 81 to assist in attuating the huli'er hlorh. When the stop 71 strikes the plunger l? and so loop as it remains in oi'lgagenicnt tlirrcwilh the whole of the extension 83 is projootod through the opening Eli! and the llat narrow ncch Hi may ride through the passage 85 with case when the atop lug 78 returns to its proper position where its spring: ran more it through the opening;- filo under its corresponding step as indicated at Hit-l. ll. however, the :arriage rohounds too tar and the plunger 72 reoedrs the extension ttl will he prevented from moving through the passage 85. The frame 15 will therefore lll held up as shown in l io'. l until the main spring again returns the neck St to the passage 8:") when the neclt will slip through and perfniit the rack 16 to drop into engagcnnart with the pawls 17 to stop and hold the arringe at the predetermined point.

in order to insure greater accuracy in properly i'lireetinp: the rat-fl: 16 into engagement with the pawla 17 the lingers are heat to the left as viewed in Fig. 5 and the thunih piece H1 is cut away on its right hand side at 8.1. as ilnlicated in Fig. 5. The springs 75 tend to return the upper plungers very quickly when permitted to do so and therefore if the fingers 80 were in the same plane as the body portion ol the plunger 4:7 it may sometimes happen that the-neck 84 of a stop device would slip through between the tlnnnh and finger hel'ore the momentum of the carriage had been overcome and the rebound of the carriage would tend to move the carriage back too far and the rack would reengage the escapement pawls to arrest the carriage at the wrong point. By bending the fingers to the left as shown, this cannot happen. So long as the buffer block is out of its initial position the locking lug 78 of the projected. upper plunger is held against the front surface of the plate 79 and the upper portion of the rod 69 lies against or in close proximity to the thicker part of the thumb 81. Now if, at the time that the bu fer block returns to its initial position and the locking lug is moved under its stop, there is any tendency for the carriage to move farther to the right the bent finger will enthe extension 83 instead of the neck 8-1? and therefore the frame 15 will be lrept from descending at such time. l hen. the carriage is again moied to the left by the main sprin the upper portion of the pin (39 engages the crtawa portion 81 of the thumb piece and stops the carriage for an instant. When this takes place the under surface of the linger S0 acting as a cam engages the neck St to force down the rack frame to insure quick rei ngagemcnt of the rack witlrthe escapen'icnt pawls to arrest the carriage at'e.\'actl the point desired in every instance.

If desired, the adjustable stop collar 4-5 may be provided with a forwardly and downwardly extending abutment 86 adapted to be struck by the upper edge of the strip 87 which is fastened to the back of the rackarrying frame. This prevents the members 83 from being lifted out of alinement with an opening 82 when a loose plunger" projected forward. However, this construction may be omitted and the limit of movement of the key against the front plate of the frame 11 depended on to limit the distance that the rod 60 will be lifted Furthermore, the frame 15 may be urged to its lowermost position by means of the spring 90 acting on the roller 89 which is above the strip 87. This spring may e adjusted in position and tension by the collar 91 and set screw 92. If desired, rollers 88. 88 may be provided against which the strip 87 may bearat times to facilitate quick movement of the carriage when jumping from one position to another. It should also he noted that I provided a dash pot J3 which. however, in some in stances may be omitted. This dash pot is connected rigidly to the support 43, its piston 9i being connected to the rod 95 which in turn is connected to the butter block. The dash pot mechanism is so arranged as to permit free movement of the buffer block against the action of the buffer spring 42 but cushions its return movement. It should also be noted that the rod 60 is mounted in brackets 96, 97 and prevented from moving longitudinally in any suitable manner as by means of the pin 98 and the abutment 99.

The latter has a limited movement in the slot 100 and determines the extent of oscillatory movement of the rod 60. A spring 101 one end of which is connected to the rod 60 and the other end of which is connected to the bracket 97 holds the stop devices'normally in an. inclined position, as shown, the member 99 extending from one of the ends of the rod 60 resting against the right side of the slot 100 as viewed in Fig. 7 I have provided means for permitting an oscillatory movement of the rod 60 to prevent interference with the mov ment of the plungers. Otherwise such interference 'might happen where it is desired to tabulate at short distances. At the right of Fig. 6 I have shown the stop devices 62 and 63 close together. for tabulation within a few letter spar-cs. To get the closest tabulation I place a stop with a straight pin. (39 as shown in i"ig. if) to the right of a stop with an extension 8 In such case the extension is unnecessary as there will be no appreciable rebound of the carriage. The upper end of ihe rod 69 will rest against the thumb 81 until the latter is withdrawn when the carriage will be arrested in the proper position. 415; indicated in Fig. 6 the sto devices 62, 63 and (i-l have been set to stop the carriage at points corresponding to 63, 68 and 71 on the front scale. The gradual stopping of the carriage by the stop device 62 has already been described. Now. upon printing two figures the carriage will be moved to the left two spaces and the extension 83 of the stop device 63 will be in front of the plungers at the extreme right. Now. upon actuating the extreme right-hand tabulatingkey the upper plunger projected will engage the extension 83 of the top device 63 and oscillate the rod 60 while the cam of the lower plunger lifts the same and allows the carriage to move to the left until the cut-away portion 81 iscngaged by the upper portion of the rod 69 when the carriage will be stopped and when the plungers are withdrawn the carriage will stop at point 68. Upon again actuating the same key, the thumb 81 will engage the pin 69 of the stop device 63 and oscillate the rod 60 while thecam of the lower plunger will lift the rod to cause the carriage to jump to the left. The upper end of the pin 69' will engage the thick portion of thumb S1 and when the plunger-s recede the pin will engage the cut-away portion 81. after which the carriage will be stopped at the point 71.

Only a few parts have been added to thecarriage to move therewith. The added momentum due to the tabulator attachment is therefore reduced toa minimum. Although the tahulator is herein shown. connected to a typewriting machine of the ordinary type. it should be understood that it may be applied to other kinds of typewriters, the type herein shown being; merely by way of illustratii'm. of the im'entioi'l.

The operation of the tahulator may he more fully explained as follow}: During; the ordinary operation of the typewriter, the keys-1S are struck and the type bars operated in the usual way to cfl'ect the ad 'ance of the carriage stcp-hy-step by means of the main s iring if) and the cscapcmcnt mechanism. When tabulations are to he made acia'iratcly and in a minimum space of time, the various parts are properly adjusted and one of the auxiliary keys 32 then actuated. Tn theconstructhm illusetrated four such keys are intended to he used but it should be understood that only one such auxiliary key would he used where only one set of stopping planners is employed. l have shown a series of four sets of such planners and therefore there should he 'four keys, one correspornling to each set of: plungcrs. Furthermore. if two or more sets of plunger-s are used they should he spaced apart such a distance that thejlateral l"aco of one plungcr is a letter space distance trom the corres 'ionding lateral f'acc ol the next succeeding ilungrer. As shown. l have in this instance made each of the lowcr plain g'crs flat throughout but the fingers 80 of the upper plungcrs are hcnt to the left as indicated in Figs. ii and 5: and the ihumhs 81 are cut away on the right-hand side.

T will now explain the various adjustments which should he made to cllcct the operation desired. ll a column of figures is to be written the rarriag'e is first set at the desired point where the first numeral is to he written and while held in such posi tion the stop (31 is inserted in the propc: hole (39 which is marked to scale correspond in; to the front index scale on the machine. For instance. if it is desired that the ear rianc shall stop at 20. the pin (3! or hf) is inserted in the hole (38 marked i l). lhcn if theright-hand tahulator key is operated, the carriage will jump to the left and stop at 520. .\s arranged the apparatus is convenient for tahulating' columns of figures of hundreds. tens. units and decimal points. so that when the right-hand kcyii'i is act'u zii'ed. the :arriagc will jump to the hundreds place and thrcdfigurcs. a decimal point. and two more tigrurcs may he written. I)) V pushing the next key to the left. thc carriage will stop at the tens place: hy operating the third her from the right the carriage may he stopped at the units place: and by opera ting): the extreme lel'tdiand key the carriage will stopin the position i'U'l'l'tSllUIltllHQ to the decimal points. A ftcuonc sci of figures in one column are written. one or more sets of figures may he written for succeeding co|- umns on the same page in the same line. For instanccn altcr operating one oi the the rod first strikes tabulating keys and writing the figures for the corresponding column, one of such keys may he operatci'l again to secure a. further jumping of the carriage so that another striking memhcr. as that designated (32 on (30, will impinge against a. plunger of the stopping m(.=chanism to effect a stopping of the carriage at the desired point forthc ligrurcsin the next column. The other striking devices 6;, (33 and (i-lare adjusted in the same nuinner by insertion in the. openings G8 which are a letter space distance apart. As hoforc explained the stop device having the straight pin. fit) is used for securing accurate tahulation in vertical columns of figures only 2. short distance from each other.

lrefe-ahly the main spring is first adjusted to have the proper tension l'or operating the rarriagc step-hy-stop with a force to suit the operator. The tension of the huller spring I2 is then adjusted so as to be only s much stronger than the main spring as is necessary to hring the hull'er hlock, stop plunger and tarriag'e hack to the position where the connection between the escapcmci'it rack har and the cscapcment pawls is to he rci stahlishcd. That is to say, the hufl'cr spring is put under such tension that after gradually stopping the carriage the latter will he returned by it against the action of the main spring and he brought to a stop at o' ahout the time that the upper piungen fan return to initial position. As soon as the stop device strikes the projected pluupyers. the tahulator hey may he released and tie lowcr plungcr immediately returns to initial position. ..\l'ter the key is relnscd the operation of restoring the parts to proper position is entirely automatic. .l l the stop hounccs hack too far the thumb and finger of the upper plung r holds the cscapcment frame up until the stop l l(!\'l(-(B again returns against the lateral face of the plunger where the neck hi can slip through hetwccn the thumh til and finger Hf). fhe i'ronstruetion may he such that the pin (it against the thickest, portion of the thumh hi and if the carriage hounces hack too far. the lhumh and finger acting on the cnlarg 'cd Minus-ion 83 l-reeps the es- .apemcni: frame from falling. W'hen the pin (35) returns to the left again it engages the cut-a\\a r portion in the righthand side oi the thumh hecausc a l'ter the first impact the plunger returns to rcgisleriug position with respect to its slot in the plate 7!) and rclrczds slightly info the same until stopped hy the inner surfacc of the heut finger 8O contacting with the culargcd extension 93, as clearly shown in Fig. f, and the hcut finger immediately ahorc heing urged to the rear hy the sprin T acts as a cam to force the slop device har (3d and frame 153 down. 'ilhcrolore when the parts are in condition as immediately after the impact for the carriage to be stopped, the escapement rack will be moved very quickly to engaging position. The upper plunger can return from its position as shown in Fig. 1 to its normal position only when the pin 69 is against the cut-awayportion 81 in the right hand side of the thumb 81, because when the parts are in that position only will the extreme end of the bent finger clear the enlarged portion 83 and pass over the neck 8st, due to the fact that the finger is bent out of the vertical plane of the thick portion of the thumb 81, the effect of which is to produce a stepped cscapement of the stop pin 69 when it is being released from the plunger. It will therefore be seen that tabulator key may be operated to effect a jumping of the carriage approximately to the proper position where it will be stopped gradually and finally stop at the exact point desire-:1 Without any loss of time whatever, occurs the key may be released the rest of the operation being entirely automatic.

T he buffer spring must be sufficiently strong under any circumstances to return the carriage to the position where the locking lug 78 can slip under its stop in the locking plate 37. The buffer spring should therefore be adjusted to return the bufier block and carriage to such position that the former will abut against the limit stop on the rod 10. As before stated, a dash pot 93 may be used to cushion the return movement of the buffer block to initial position. The tension of the spring 12 may be varied by sliding the ring 4-5 along the rod 40 and fastening it in the adjusted position by means of the set screw ll, and the position of the abutment 4.5 may be varied in a similar manner. lt will be evident that even if the buffer spring is set to have too great a tension with respect to the main spring so that the bulier spring tends to recoil too strongly, the construction which I have devised comprising the thumb and linger catch and the extension 83 will nevertheless effect the stopping of the carriage at the exact point desired. A nice balance between the buffer spring and the main spring need not therefore be maintained but the main spring may be adjusted to suit the operator and the buil'er spring let alone so long as it is sufiiciently strong to return the buffer block against its stop if).

If the buffer spring and main spring are approximately balanced. in some instances the thumb and finger need not be depended upon. Or stop devices having straight pins 69 only may be used. in such event, the tahulating keys should be l-rept depressed until the carriage is stopped in the proper position. It will be observed that when the buffer block is struck it will move to the left carrying the plunger with it. The upper ends of the levers 2 1 are provided With wings 102, 103, 104- and 105 extending to the left to engage respectively with the plungers e7, 18, i9 and which are arranged in steps as shown in Figs. 3 and i. If any key is actuated the corresponding plunger will be thrust forward and its rear extension will remain in engagement with the corresponding wing until the key is released, without interfering with any other extcnsion or wing.

Although I have shown the vertical width of the opening 38 as uniform and the vertical width of the right-hand portion of the opening 38 as variable, as indicated, I wish it to he understood that 1 do not desire to be limited to this exact construction, as such openings may be made of various shapes or contour. So also those skilled in the art may make various changes in the details and arrangement of other parts without departing from the spirit and scope of my invention as defined by the claims a n l I wish, therefore, not to be limited to tn: precise construction herein disclosed.

Having thus fully disclosed my invention, what I claim and desire to have protected by Letters Patent of the United States isl. The combination in a typewriting machine, of a tabulator attachment comprising a resilient bulfcr for the carriage, a dash pot for retarding its rebound,- and auto- I matic means for arresting said carriage in a predetermined position after rebounding.

2. in a typewriting machine, the combination with a resilient buffer, of a buffer block associated therewith, a double plunger. and a locking plate cooperating with said jilunger.

3. In a typcwriting machine, the combination. with a resilient buffer. of a double l illlllgtil', a carrier for said plunger, and a locking plate cooperating with said plunger.

-l-. 1n :1 typewriting machine, the combination with a resilient buffer. of a double plunger, a carrier for said plunger, a lock ing plate cooperating with said plunger, and means for restoring said plunger to initial osition.

5. ln :1. typewriting machine, the combination with a resilient buli'er, of a double plunger. a carrier for said plunger, a looking plate i-ooperating with said plunger, means for moving said plunger to operative position, and automatic mechanism for restoring said plunger to initial position.

(5. in stop devices for tabulator attach Inents, the combination of a spring-pressed oscillatory perforated rod. and one o r more stop devices comprising inverted U-shaped metal bands or springs fitting over and around said rod and pins connected to said bands and insertible in the perforations.

7. ln tabulator attachments for typewriting machines, the combination with a periterated rod; of a member fitting over and around said rod and providtal with a stop or striker, and a pin eoninnrted to said me1nher and insrrtihle in the rod.

8. In a tabulat'or athirluuent l or typewrit ing inaehines. the eemhination with an inverted U-shaped spring nienil-er provided with a striking portion. ol a pin connected to said member. and a. latmral extension eonuerted by a narrow noel; to said pin.

9. .ln tahulator attachments for typewrih in; machines, the ooinhim tion with a stop dei'iee movable with the earriae'e. ot a butler hloek, a plunger 'arried by said hlorrlt. a key and. (ronnertions 'tor actuating said plan-- ger to interpose the same in the path of said stop device, a huller spring, an addi tional, plunger. and means emu-ting with said last-na1ned plunger to elleet the stop ping oi the mrriage in a predetermined po sition.

it). In tahulator attarhnumts for t l 'pewritn inn inarhines. the combination with one or mo e stop tlQYltitS movable with the tairriagzje. ol :1 spring-pressed pluup' iga. spriugjpressei'l luil'l'er hloek carrying said plungrr, an addi tional spring-pressed plungera tahulator key and connections 'lor moving hoth plungei'u lorward and thereby dismuunarting the earriag'e from the totalling iuerhanism and interposingone of the plungers in the path of movement of a: stop device. and means eonoting with the other plunger to effect the arrest of the carriage at a. predetermined point.

ll. flu taludator attarlunents l'or typewrib iug machines, the combination with a striker movable with the carriage, ol' huller mechanism romprising a plunger. a taluilator key and ronneotionn Fo' urinating said plunger to rause the same to (llStfUlHltafli the carriage l'roni the 'leed mechanism and also iuterpose itself in the path of said striker, an addi tional plunger having a l'orward movement with said lirst-i'iamed plunger hut having; an independent rearward movement, and means ro-artiug with said additional plunger to prevent the earriage lroui luring: reronnectial to its feeding HILHlHIIIlSIIl until it stops in a l)l'Wltl,tl'llll!lttl poration.

152. la taluilator allaehuieutz-i lor typewritiug llltll'llllltS, the combination with a mow ahle rai'l'irr. ol a hutler spring holding: the same in initial position. a spiing-prwmal plunger normally held in its rear position, a. taluilalor her and rounertions l'or thrusting said plungg'er Forward to rause the same to disrounert the rarriage ol' the l vpe\'-=ritiu;4' marhine from its lei-ding: inerhanisln. a striker movahle with said carriage and an ranged to engage said plun g er and transmit l'he loree ol' the impart to said hull'er spring to stop the earriae'e gradually. an additional HIll'lllfilH'PSt-Illl plunger movahle foiuardl with the lirst; named plunger hut Emi h an independent rearward movement, a stop lug carried by said additional plunger. a looking plate preventing the return of said additional plunger to initial position until the earriage returns to the posh tion where the striker en pigg'ed the first;- nanied plunger. and an exiensioi'i on said additional planner for mainlaiuil'lg' the Calriage disromierted from its l'eeding Illtrtillttnism iinlepeinlenlly ol. said lirst named plunger.

121. In tahulator stop nnazhanisin, the comhination with a rarrier, of a lower plunger and an upper plunger mounted in said earrier. a liull'rr spring. springs; holding said planners initially in their ran-wardpositions. a ram ()ll]| 'tl((l to the front end. of the lower plunger. a lot-hing plate, a locking lug on the upper plunger. and a am on the front end ol the upper plunger.

H. In tahulator stop nn-ohanisin, the romhination with u hull'er block, of two parallel rods earryiiu, said hloek an adjustable huller spring on one ol said rods, an ad.- justahle stop for said hull'er hloeli'. n fixed looking plate in l'ront of said block. a springp-pren-ml rain and ahutnient plunger unu'ahle through an opening in said lookin plate an additional spring-pressed plunger iiuunaliatelr above the lirist-uiilmed phung'er and forward therewith movable through said opening; lull. ha ring an independent rearward iuorenient, a earn exten sion on the l'ronl end of said upper plunger, and a lot-lune ha; to prerent the return of said upper plunger when the hloelr is out. of initial position.

15. In tahulator attaehinenlja for typewritingr umrhines. the eon'ihination with it stop derive morahle with the earring'e and r-omprising an enlargg ed la leral extension and a narrow nerli. ol hull'er nnarhanisin comprising a phuurer having? a llu nih and finger l'or eal'rhingg or holding}; Hlilll extension until the rarriagge alops in a prinleteriuined position. and means tordisa-ounretintg the rarriage lrom ila tor-d ng inenhanism and bringing: the hull'er merhanism into play.

ll', ln tahulalor altarln'ueuts For typewriling inarhines. tho romhination with. a stop derive on a rod moralile with the rarriane and roinprising an enlarged extension and a narrow Ilitli. ol' a butler spring, a hufl'er hlorli, lillt' or more plungrrs For engaging raid rod to diz-a'onueet the carriage from the trial. a lahulalor key and eonneetious l'or arinatie a rorreaponding plunger, and a loose plunger alan'e the lirst-named plunger. and proridml with a thumb and linger l'or rah-hing;- said enlarged extension, the linger la-iup hent laterally and the thumb having a portion ol one of its lateral faces rut-awav to prevent the reeonuertion of the had ln-l'ore llu. rarriage stops in n predetermined position,

l'RIn tabulator attachments for typewriting machines, the combination with a stop device, of a rod carrying the same and movable with the carriage, a lateral extension connected to said stop device by a fiat narrow neck, a butter spring, a buffer block, a cam plunger, a tabulator key and connections for actuating said plunger to cause the same to disconnect the carriage from its feed and allow the main motor spring to jump the carriage until the stop device strikes the plunger and the carriage is stopped gradually by the buffer block and butter spring, and an upper plunger having a bent lingerand thumb with a portion cut away, to catch the aforesaid lateral extension and hold the stop rod until the carriage stops in a predetermined position.

18. In carriage stops for typewriters, the combination with a fixed rod, of a resilient buffer, a buffer block slidably mounted upon said rod, a double plunger carried by said butter block, and a fixed locking plate eooperating with said plunger.

19. In carriage stops for typewriters, the

combination with a rod adapted to be secured to the typewriter frame, of locking plate adapted to be fixed to said frame, a butler block slidable on said rod, a butler spring on said rod, a. double plunger carried by said block and cooperating with said locking plate. means for moving said plunger to operative position, and mechanism for automatically restoring said plunger to initial position.

20. In a tabulator for typewriting inachines, the combination of means for releasing the stcp-by-step fe d in a typewriter with cooperating stops on the typewriter frame and on the *arriage respectively, one of which is adapted to be projected into the path of the other to arrest the carriage, a cushion to relieve the impact of the carriage when said stops collide. and a locking out device cooperating with said stops. said locking out device inchuling a thumb and a hooked linger on one of said stops and out of alinenient with each other, a recess in said thumb and a relatively thin neck upon the other of said stops whereby the projected stop is gradually released from the other stop and said step-by-ste i iced positively iorced into reiingagenicnt by said hooked tingm'.

'31. in a tabulator for lypewriiing niachinrs. th coinbiir tion with means ioi disengaging the lette feed of the typewriter, and stops on the it; pewritm' Hom and carriag respcrtivcly to arrest the carriage. when the said lettrr feed is disengaged. with i leans for in hing m d stops \vitheachother, m ans for 'm .lly unlocking the same. and u-aos for positively towing said letter feed into reengagement at a predetermined point.

22. In a tabulator for typewriting machines, the combination With means for disengaging the letter feed of the typewriter, of stops for arresting the carriage when said letter teed is disengaged, and automatic means for gradually and positively rengaging said letter feed at a predetermined point.

23. In a typewritin'g machine, the combination with a movable carriage, of stop mechanism comprising a cushion for relieving the force oi? the impact of the carriage, means fora ahsorbin the recoil imparted to the carriagcy and locking-out mechanism for positively stopping the carriage at a selected point.

2%. In a typewriting machine, the combination with a movable carriage, of stop mechanism for determining the point at which the carriage is to be stopped, a cushion for relieving the force of the impact of the *arriage when engaged by the stop mechanisi'i'i, and resilient means for absorbing the recoil imparted to the carriage by the cushion.

In a typewriting machine, the combin-ation with a movable carriage, motor mechanism therefor, step by-step spacing mechanism. stop mechanism for determining the point at which the carriage is to be arrested, a cushion for relieving the force of the impact of the carriagewhen engaged by the stop mechanism, and means for positively absorbii'ig the recoil imparted to the carriage by the cushion.

26.1n a selective stop mechanism for typewriter carriages, the combination with a stop, an abutment cooperating with the stop to arrest the carriage in its advanced inoven'ient, a key for operating said abut merit, a cushion for relieving the force of the impact of the carriage when said abutment is operated to engage with the stop, and an air cushioning device attached to absorb the recoil of the carriage due to the action of said cushion.

. in a typewriting machine, he combination with a movable carriage, motor merhanisiu therefor, stop mechanism for determining the point at which the carriage is to he stopped, a cushion for relieving the force ol the impact of the carriage when engaia'ed by the stop mechanism, and resilient means For absorbing the recoil imparted to the carriage by the cushion.

in testimony whereof I have signed my name to this :oaecilication, in the presence oi? un) subscribing witnesses, on this 17th day of May, A. D. 1909.

CHARLES T. FRANCRZ llitnesses:

.l. H. Jocimii. J12. A. L. Srmnunn. 

